From: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
To: video4linux-list@redhat.com
Cc: linux-sh@vger.kernel.org
Subject: Re: [PATCH 04/06] videobuf: Add physically contiguous queue code
Date: Mon, 14 Jul 2008 12:20:34 +0000 [thread overview]
Message-ID: <487B4492.2020301@teltonika.lt> (raw)
In-Reply-To: <20080714120240.4806.15664.sendpatchset@rx1.opensource.se>
Magnus Damm wrote:
> This is V3 of the physically contiguous videobuf queues patch.
> Useful for hardware such as the SuperH Mobile CEU which doesn't
> support scatter gatter bus mastering.
gather
^
>
> Since it may be difficult to allocate large chunks of physically
> contiguous memory after some uptime due to fragmentation, this code
> allocates memory using dma_alloc_coherent(). Architectures supporting
> dma_declare_coherent_memory() can easily avoid fragmentation issues
> by using dma_declare_coherent_memory() to force dma_alloc_coherent()
> to allocate from a certain pre-allocated memory area.
>
> Signed-off-by: Magnus Damm <damm@igel.co.jp>
Tested-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
WARNING: multiple messages have this Message-ID (diff)
From: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
To: video4linux-list@redhat.com
Cc: video4linux-list@redhat.com, linux-sh@vger.kernel.org
Subject: Re: [PATCH 04/06] videobuf: Add physically contiguous queue code V3
Date: Mon, 14 Jul 2008 15:20:34 +0300 [thread overview]
Message-ID: <487B4492.2020301@teltonika.lt> (raw)
In-Reply-To: <20080714120240.4806.15664.sendpatchset@rx1.opensource.se>
Magnus Damm wrote:
> This is V3 of the physically contiguous videobuf queues patch.
> Useful for hardware such as the SuperH Mobile CEU which doesn't
> support scatter gatter bus mastering.
gather
^
>
> Since it may be difficult to allocate large chunks of physically
> contiguous memory after some uptime due to fragmentation, this code
> allocates memory using dma_alloc_coherent(). Architectures supporting
> dma_declare_coherent_memory() can easily avoid fragmentation issues
> by using dma_declare_coherent_memory() to force dma_alloc_coherent()
> to allocate from a certain pre-allocated memory area.
>
> Signed-off-by: Magnus Damm <damm@igel.co.jp>
Tested-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list
next prev parent reply other threads:[~2008-07-14 12:20 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-14 12:02 [PATCH 00/06] soc_camera: SuperH Mobile CEU patches V3 Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-14 12:02 ` [PATCH 01/06] soc_camera: Move spinlocks Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-14 12:31 ` Guennadi Liakhovetski
2008-07-14 12:31 ` Guennadi Liakhovetski
2008-07-14 12:36 ` Paulius Zaleckas
2008-07-14 12:36 ` Paulius Zaleckas
2008-07-14 12:43 ` Guennadi Liakhovetski
2008-07-14 12:43 ` Guennadi Liakhovetski
2008-07-15 8:23 ` Magnus Damm
2008-07-15 8:23 ` Magnus Damm
2008-07-14 12:02 ` [PATCH 02/06] soc_camera: Add 16-bit bus width support Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-14 12:02 ` [PATCH 03/06] videobuf: Fix gather spelling Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-14 12:02 ` [PATCH 04/06] videobuf: Add physically contiguous queue code V3 Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-14 12:20 ` Paulius Zaleckas [this message]
2008-07-14 12:20 ` Paulius Zaleckas
2008-07-14 12:02 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3 Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-18 7:39 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver Guennadi Liakhovetski
2008-07-18 7:39 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3 Guennadi Liakhovetski
2008-07-18 8:07 ` Magnus Damm
2008-07-18 8:07 ` Magnus Damm
2008-07-18 8:23 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver Guennadi Liakhovetski
2008-07-18 8:23 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3 Guennadi Liakhovetski
2008-07-18 21:05 ` Paul Mundt
2008-07-18 21:46 ` Paul Mundt
2008-07-18 22:14 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver Guennadi Liakhovetski
2008-07-18 22:14 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3 Guennadi Liakhovetski
2008-07-18 22:27 ` Paul Mundt
2008-07-18 22:48 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver Guennadi Liakhovetski
2008-07-18 22:48 ` [PATCH 05/06] sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3 Guennadi Liakhovetski
2008-07-14 12:02 ` [PATCH 06/06] soc_camera_platform: Add SoC Camera Platform driver Magnus Damm
2008-07-14 12:02 ` Magnus Damm
2008-07-18 7:40 ` [PATCH 00/06] soc_camera: SuperH Mobile CEU patches V3 Guennadi Liakhovetski
2008-07-18 7:40 ` Guennadi Liakhovetski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=487B4492.2020301@teltonika.lt \
--to=paulius.zaleckas@teltonika.lt \
--cc=linux-sh@vger.kernel.org \
--cc=video4linux-list@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.